They’re a little brazen. Can you see his tongue hanging out? Not exactly in his right mind. Do not mess with a deer with the tongue hanging out, it means ‘crazy’.
Fortunately, the little black fuzzy dog’s barking scared him off. 16 lb dog VS 100 lb deer… that’s got to be good for a canine’s self-esteem. 
Fun Fact: now that the deer are down from the hills cuz there’s nothing else green to eat, it’s definetly time to fence up the orchard.
